bug with definition at top-level:

3:54pm moussor:handalign/ ghci
   ___         ___ _
  / _ \ /\  /\/ __(_)
 / /_\// /_/ / /  | |      GHC Interactive, version 6.0, for Haskell 98.
/ /_\\/ __  / /___| |      http://www.haskell.org/ghc/
\____/\/ /_/\____/|_|      Type :? for help.

Loading package base ... linking ... done.
Loading package lang ... linking ... done.
Prelude> let f s = let (p1:_:p2:_:r1:_:f2:_) = map read (words s) in show
((2*p1*r1)/(p1+r1)) ++ " & " ++ show ((2*p2*f2)/(p2+f2))
ghc-6.0: panic! (the `impossible' happened, GHC version 6.0):
        getLinkDeps No iface for [<pkg>]GHCziErr

Please report it as a compiler bug to glasgow-haskell-bugs@xxxxxxxxxxx,
or http://sourceforge.net/projects/ghc/.



--
 Hal Daume III                                   | hdaume@xxxxxxx
 "Arrest this man, he talks in maths."           | www.isi.edu/~hdaume